make tool come outside the stock while cutting

make safetyheight higher than stock



git-svn-id: https://pycam.svn.sourceforge.net/svnroot/pycam/trunk@13 bbaffbd6-741e-11dd-a85d-61de82d9cad9

pycam/Exporters/SimpleGCodeExporter.py

@@ -5,9 +5,15 @@ from gcode import gcode
 
 class SimpleGCodeExporter:
 
-    def __init__(self, filename, safetyheight=7.0, homeheight=7.0):
+    def __init__(self, filename, unit, x, y, z):
         self.file = file(filename,"w")
-        self.gcode = gcode(homeheight, safetyheight)
+        if unit == "mm":
+            self.file.write("G20\n")
+            z += 7.0
+        else:
+            self.file.write("G21\n")
+            z += 0.25
+        self.gcode = gcode(x,y,z)
         gc = self.gcode
         self.file.write(gc.begin()+"\n")
         self.file.write(gc.safety()+"\n")
@@ -31,12 +37,8 @@ class SimpleGCodeExporter:
             self.AddPath(path)
 
 
-def ExportPathList(filename, pathlist, unit):
-    exporter = SimpleGCodeExporter(filename)
-    if unit == "mm":
-        exporter.file.write("G20\n")
-    else:
-        exporter.file.write("G21\n")
+def ExportPathList(filename, pathlist, unit, x, y, z):
+    exporter = SimpleGCodeExporter(filename, unit, x, y, z)
     exporter.AddPathList(pathlist)
     exporter.close()
 

pycam/Exporters/gcode.py

@@ -16,15 +16,18 @@ class gcode:
 	lastx = lasty = lastz = lasta = lastgcode = None
 	lastfeed = None
 
-	def __init__(self, homeheight = 1.5, safetyheight = 0.04):
-		self.homeheight = homeheight
-		self.safetyheight = self.lastz = safetyheight
+	def __init__(self, startx, starty, startz, homeheight = 1.5, safetyheight = 0.04):
+                self.startx = startx
+                self.starty = starty
+                self.startz = startz
+		self.homeheight = max(startz,homeheight)
+		self.safetyheight = self.lastz = max(self.homeheight,safetyheight)
 
 	def begin(self):
-		return "G00 Z%.4f\n" % (self.safetyheight) + \
-			"G17 G40 G49\n" + "G54 G80 G90 G94\n" + \
-			"S1000 M3\n" + "G04 P3" + \
-                        "T1 M6 F0.1\n"
+		return "G40 G49 G54 G80 G90\n" + \
+        	       "S1000 F10\n" + \
+                       "G04 P3 T1 M6\n" + \
+                       "G00 X%.4f Y%.4f Z%.4f\n" % (self.startx, self.starty, self.startz)
 
 	def end(self):
 		return self.safety() + "\n" + "M2\n"

pycam/Gui/SimpleGui.py

@@ -164,12 +164,14 @@ class SimpleGui(Frame):
             toroid = float(self.ToroidRadius.get())
             self.cutter = ToroidalCutter(radius, toroid)
 
-        minx = float(self.MinX.get())
-        maxx = float(self.MaxX.get())
-        miny = float(self.MinY.get())
-        maxy = float(self.MaxY.get())
-        minz = float(self.MinZ.get())
-        maxz = float(self.MaxZ.get())
+        offset = radius/2
+
+        minx = float(self.MinX.get())-offset
+        maxx = float(self.MaxX.get())+offset
+        miny = float(self.MinY.get())-offset
+        maxy = float(self.MaxY.get())+offset
+        minz = float(self.MinZ.get())-offset
+        maxz = float(self.MaxZ.get())+offset
         samples = float(self.Samples.get())
         lines = float(self.Lines.get())
         layers = float(self.Layers.get())
@@ -216,7 +218,14 @@ class SimpleGui(Frame):
         if filename:
             self.OutputFileName.set(filename)
             if self.toolpath:
-                exporter = SimpleGCodeExporter.ExportPathList(filename, self.toolpath, self.Unit)
+                offset = float(self.CutterRadius.get())/2
+                minx = float(self.MinX.get())-offset
+                maxx = float(self.MaxX.get())+offset
+                miny = float(self.MinY.get())-offset
+                maxy = float(self.MaxY.get())+offset
+                minz = float(self.MinZ.get())-offset
+                maxz = float(self.MaxZ.get())+offset
+                exporter = SimpleGCodeExporter.ExportPathList(filename, self.toolpath, self.Unit, minx, miny, maxz)
 
     def createWidgets(self):
         self.ogl = OpenglWidget(self, width=600, height=500)